Man spends years developing big bomb that can kill hundreds of thousands of people and in the end realizes what he has done:

"I am become cringe. The quoter of words."

I remember one scene where the extra walked super slowly, apparently to get more screentime.

There Will Be Blood

It was such a magnificient experience that I want to be in the perfect mood next time I watch it.

I mentally heard this theme.

Getting a call, but no text explaining the reason for the call makes me call back a few days later.